Multiple Bio-Inspired Father–Son Underwater Robot for Underwater Target Object Acquisition and Identification

Underwater target acquisition and identification performed by manipulators having broad application prospects and value in the field of marine development. Conventional manipulators are too heavy to be used for small target objects and unsuitable for shallow sea working. In this paper, a bio-inspired Father–Son Underwater Robot System (FURS) is designed for underwater target object image acquisition and identification. Our spherical underwater robot (SUR), as the father underwater robot of the FURS, has the ability of strong dynamic balance and good maneuverability, can realize approach the target area quickly, and then cruise and surround the target object. A coiling mechanism was installed on SUR for the recycling and release of the son underwater robot. A Salamandra-inspired son underwater robot is used as the manipulator of the FURS, which is connected to the spherical underwater robot by a tether. The son underwater robot has multiple degrees of freedom and realizes both swimming and walking movement modes. The son underwater robot can move to underwater target objects. The vision system is installed to enable the FURS to acquire the image information of the target object with the aid of the camera, and also to identify the target object. Finally, verification experiments are conducted in an indoor water tank and outdoor swimming pool conditions to verify the effectiveness of the proposed in this paper.

Interplanetary Coronal Mass Ejections from MAVEN Orbital Observations at Mars

The measurements from the Mars Atmosphere and Volatile EvolutioN spacecraft, in orbit around Mars, are utilized to investigate interplanetary coronal mass ejections (ICMEs) near 1.52 au. We identify 24 ICMEs from 2014 December 6 to 2019 February 21. The ICME list is used to examine the statistical properties of ICMEs. On average, the magnetic field strength of 5.99 nT in ICMEs is higher than that of 5.38 nT for stream interaction regions (SIRs). The density of 5.27 cm−3 for ICMEs is quite comparable to that of 5.17 cm−3 for SIRs, the velocity of 394.7 km s−1 for ICMEs is slightly lower than that of 432.8 km s−1 for SIRs, and the corresponding dynamic pressure of 1.34 nPa for ICMEs is smaller than that of 1.50 nPa for SIRs. Using existing databases of ICMEs at 1 au for the same time period, we compare ICME average properties at 1.52 au with those at 1 au. The averages of the characteristic quantities decrease by a factor of 1.1–1.7 from 1 to 1.52 au. In addition, we analyze an unusual space weather event associated with the ICME on 2015 March 9–10, and propose that the extremely strong dynamic pressure with a maximum of ∼18 nPa on March 8 is caused by the combined effects of the enhanced density inside a heliospheric plasma sheet (HPS), the compression of the HPS by the forward shock, and the high velocity of the sheath ahead of the ICME.

Business Model Construction from Dynamic Capabilities Perspective

The construction of the business model is to shape the structure of various activities in the plate according to the task attributes and task objectives of each section in the business model. The Dynamic Capabilities of the enterprise determine the result of the construction of the business model, and its strength also affects the adaptation and operation of the business model institutions to the new business model. Enterprises with strong Dynamic Capabilities have a good execution ability in the business model architecture, and can also quickly adapt to the structural framework of changing their business model, and improve the feasibility of the actual operation of the business model. This paper will be in the framework of the Dynamic Capabilities theory, the construction of business model, through the case from model construction, design innovation to the coordinated operation of the new model, concluded that the two have a strong interaction, including the enterprise higher-order Dynamic Capabilities has a strong positive influence on the choice of business model, construction and application.

Business Model Construction from Dynamic Capabilities Perspective

The construction of the business model is to shape the structure of various activities in the plate according to the task attributes and task objectives of each section in the business model. The Dynamic Capabilities of the enterprise determine the result of the construction of the business model, and its strength also affects the adaptation and operation of the business model institutions to the new business model. Enterprises with strong Dynamic Capabilities have a good execution ability in the business model architecture, and can also quickly adapt to the structural framework of changing their business model, and improve the feasibility of the actual operation of the business model. This paper will be in the framework of the Dynamic Capabilities theory, the construction of business model, through the case from model construction, design innovation to the coordinated operation of the new model, concluded that the two have a strong interaction, including the enterprise higher-order Dynamic Capabilities has a strong positive influence on the choice of business model, construction and application.

Design and behaviour of the Large Hadron Collider external beam dumps capable of receiving 539 MJ/dump

Two 6 t beam dumps, made of a graphite core encapsulated in a stainless steel vessel, are used to absorb the energy of the two Large Hadron Collider (LHC) intense proton beams during operation of the accelerator. Operational issues started to appear in 2015 during LHC Run 2 (2014–2018) as a consequence of the progressive increase of the LHC beam kinetic energy, necessitating technical interventions in the highly radioactive areas around the dumps. Nitrogen gas leaks appeared after highly energetic beam impacts and instrumentation measurements indicated an initially unforeseen movement of the dumps. A computer modelling analysis campaign was launched to understand the origin of these issues, including both Monte Carlo simulations to model the proton beam interaction as well as advanced thermo-mechanical analyses. The main findings were that the amount of instantaneous energy deposited in the dump vessel leads to a strong dynamic response of the whole dump and high accelerations (above 200 g). Based on these findings, an upgraded design, including a new support system and beam windows, was implemented to ensure the dumps' compatibility with the more intense beams foreseen during LHC Run 3 (2022–2025) of 539 MJ per beam. In this paper an integral overview of the operational behaviour of the dumps and the upgraded configurations are discussed.

DYANAMIC CAPABILITY PESANTREN ENTREPRENEUR

The dynamic capabilities approach examines how organizations build and maintain their competitive position in situations of rapid and unpredictable organizational change. Teece (2008) states that the dynamic capability component involved in shaping (not just adjusting) the environment is an entrepreneurial characteristic. This means that an organization with strong dynamic capabilities is highly entrepreneurial. Where they not only adapt the business ecosystem, but also shape it through innovation and collaboration with other organizations or companies and institutions. Based on the background and several studies from the literature that the author reviewed, and the model contained in Figure 1 in this research report, the authors are interested in conducting a study of dynamic capabilities in relation to how to realize and develop entrepreneurship-based pesantren, or in this paper it is called as a pesantrenpreneur. A new concept that can be developed into a new theory about how pesantrenpreneurs are developed through dynamic capabilities. Furthermore, this study brings theoretical implications and directions for future research. Keywords: Dynamic Capabilities, Pesantrenpreneur

Probabilistic Temporal Networks with Ordinary Distributions: Theory, Robustness and Expected Utility

Most existing works in Probabilistic Simple Temporal Networks (PSTNs) base their frameworks on well-defined, parametric probability distributions. Under the operational contexts of both strong and dynamic control, this paper addresses robustness measure of PSTNs, i.e. the execution success probability, where the probability distributions of the contingent durations are ordinary, not necessarily parametric, nor symmetric (e.g. histograms, PERT), as long as these can be discretized. In practice, one would obtain ordinary distributions by considering empirical observations (compiled as histograms), or even hand-drawn by field experts. In this new realm of PSTNs, we study and formally define concepts such as degree of weak/strong/dynamic controllability, robustness under a predefined dispatching protocol, and introduce the concept of PSTN expected execution utility. We also discuss the limitation of existing controllability levels, and propose new levels within dynamic controllability, to better characterize dynamic controllable PSTNs based on based practical complexity considerations. We propose a novel fixed-parameter pseudo-polynomial time computation method to obtain both the success probability and expected utility measures. We apply our computation method to various PSTN datasets, including realistic planetary exploration scenarios in the context of the Mars 2020 rover. Moreover, we propose additional original applications of the method.

Study on Influence Laws of Strata Behaviors for Shallow Coal Seam Mining beneath Gully Terrain

The study on influence laws of strata behaviors is the basic guarantee of safety mining for shallow coal seam beneath gully terrain. Taking 3302 mining face of Zhujiamao Coal Mine as the engineering background, the laws of strata behaviors for shallow coal seam mining beneath gully terrain are studied by field detection, theoretical analysis, and numerical simulation. The strata pressure observation and the hydraulic support working resistance show that the dynamic strata behaviors appear violently during mining beneath the gully bottom. The theoretical analysis shows that the rotation and breaking of key stratum beneath gully bottom under nonuniform load is the fundamental cause of strong dynamic strata behaviors. The numerical simulation of overburden movement and fissure development characteristics shows that the strata behaviors beneath the gully bottom are stronger than the strata behaviors beneath other areas. Additionally, according to the laws of dynamic strata behaviors, the safety measures for mining beneath gully bottom are put forward.

Probing intramolecular vibronic coupling through vibronic-state imaging

Vibronic coupling is a central issue in molecular spectroscopy. Here we investigate vibronic coupling within a single pentacene molecule in real space by imaging the spatial distribution of single-molecule electroluminescence via highly localized excitation of tunneling electrons in a controlled plasmonic junction. The observed two-spot orientation for certain vibronic-state imaging is found to be evidently different from the purely electronic 0–0 transition, rotated by 90°, which reflects the change in the transition dipole orientation from along the molecular short axis to the long axis. Such a change reveals the occurrence of strong vibronic coupling associated with a large Herzberg–Teller contribution, going beyond the conventional Franck–Condon picture. The emergence of large vibration-induced transition charges oscillating along the long axis is found to originate from the strong dynamic perturbation of the anti-symmetric vibration on those carbon atoms with large transition density populations during electronic transitions.